package com.admin.framework.shiro.service;

import com.admin.common.constant.Constants;
import com.admin.common.constant.ShiroConstants;
import com.admin.common.exception.user.UserPasswordNotMatchException;
import com.admin.common.exception.user.UserPasswordRetryLimitExceedException;
import com.admin.common.utils.MessageUtils;
import com.admin.framework.manager.AsyncManager;
import com.admin.framework.manager.factory.AsyncFactory;
import com.admin.system.domain.SysUser;
import org.apache.shiro.cache.Cache;
import org.apache.shiro.cache.CacheManager;
import org.apache.shiro.crypto.hash.Md5Hash;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * 登录密码方法
 *
 * @author fangchen
 */
@Component
public class SysPasswordService {
    @Autowired
    private CacheManager cacheManager;

    private Cache<String, AtomicInteger> loginRecordCache;

    @Value(value = "${user.password.maxRetryCount}")
    private String maxRetryCount;

    @PostConstruct
    public void init() {
        loginRecordCache = cacheManager.getCache( ShiroConstants.LOGINRECORDCACHE );
    }

    public void validate(SysUser user, String password) {
        String loginName = user.getLoginName();

        AtomicInteger retryCount = loginRecordCache.get( loginName );

        if (retryCount == null) {
            retryCount = new AtomicInteger( 0 );
            loginRecordCache.put( loginName, retryCount );
        }
        if (retryCount.incrementAndGet() > Integer.valueOf( maxRetryCount ).intValue()) {
            AsyncManager.me().execute( AsyncFactory.recordLogininfor( loginName, Constants.LOGIN_FAIL, MessageUtils.message( "user.password.retry.limit.exceed", maxRetryCount ) ) );
            throw new UserPasswordRetryLimitExceedException( Integer.valueOf( maxRetryCount ).intValue() );
        }

        if (!matches( user, password )) {
            AsyncManager.me().execute( AsyncFactory.recordLogininfor( loginName, Constants.LOGIN_FAIL, MessageUtils.message( "user.password.retry.limit.count", retryCount ) ) );
            loginRecordCache.put( loginName, retryCount );
            throw new UserPasswordNotMatchException();
        } else {
            clearLoginRecordCache( loginName );
        }
    }

    public boolean matches(SysUser user, String newPassword) {
        return user.getPassword().equals( encryptPassword( user.getLoginName(), newPassword, user.getSalt() ) );
    }

    public void clearLoginRecordCache(String username) {
        loginRecordCache.remove( username );
    }

    public String encryptPassword(String username, String password, String salt) {
        return new Md5Hash( username + password + salt ).toHex().toString();
    }

    public void unlock(String loginName) {
        loginRecordCache.remove( loginName );
    }

}
